TKO 2.0 by Jeff Kaylor

 TKO 2.0 is a utility device that works with any button-up shirt. It allows you to perform all of the clean and visual vanishes of the original TKO while adding the killer card techniques made possible by the Ultimate Card Control Utility (UCCU).

The UCCU–and now, TKO 2.0–allows you to secretly yet flawlessly maintain control over one or more cards while the spectator shuffles the deck. The cards can then be produced from the deck or found in an impossible location, such as an envelope that has been in plain sight the entire time.